براغي رأس كبس HOlO-KROME 72180 3/8-16 × 4 بوصة | محرك سداسي | فولاد سبائكي أسود حراري (50 / عبوة)

The black oxide finish on these screws gives them a nice, uniform look and seems like it will hold up well against rust in my shop. They threaded cleanly into my fixture plate without any binding or wobble, which is always a relief. Exactly what I needed for jig assembly work.

I needed some high-strength bolts for a jig I was building, and these 3/8-16 x 4" cap screws came in a handy 50-pack. The hex socket drive made installation a breeze with my allen wrench, no slippage at all. They're solid alloy steel with that thermal black oxide, exactly what I expected for tooling

The black oxide finish held up perfectly during assembly, no galling at all. Each screw threaded smoothly into tapped holes without binding, which saved me a ton of time on my latest fixture.